Modeling of underwater bomb trajectory for mine clearance

View/Open

Download Record

Author

Date

Metadata

Abstract

The falling of a Joint Direct Attack Munition (JDAM) through a water column was modeled using a six degrees of freedom
model (called STRIKE35), which contains three components: hydrodynamics, semi-empirical determination of the drag/
lift/torque coefficients (depending on the Reynolds number and the angle of attack), and water surface characteristics. To
validate and verify this model, three underwater bomb trajectory tests were conducted in the Naval Air Warfare Center,
Weapons Division (NAWC/WD) in the middle of Indian Wells Valley, California. During the test, several JDAMs were
dropped from an airplane into two frustum ponds with the same bottom diameter of approximately 30.5 m, different
surface diameters (61 m, 79 m), and different depths (7.6 m, 12.1 m). High-speed digital cameras with light/pressure
sensors, and a global positioning system were used to record the location and orientation of JDAMs. Model–data inter
comparison shows the capability of STRIKE35, which may lead to a new approach (breaching technology) of sea mine
clearance in very shallow water (water depth less than 12.2 m, i.e. 40 ft).

Description

Journal of Defense Modeling and Simulation, the Society for Modeling and Simulation International, 8 (1)

Related items

In this paper, a closed-loop switching function for on-off thruster firings is proposed to provide good attitude control performance in the presence of modeling errors for single-axis slew maneuver of a rigid spacecraft ...

Monterey Phoenix (MP) has been designed as a framework for system and software architecture modeling and verification with
focus on modeling the system’s and the environment’s behaviors. With the development of more case ...

Current practices for modeling the ocean floor in underwater explosion simulations call for application of an inviscid fluid with soil properties. A method for modeling the ocean floor as a Lagrangian solid, vice an Eulerian ...